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ファイルを書き込んで読み込むサンプルプログラムです。
#include <Adafruit_Arcada.h>
#if !defined(USE_TINYUSB)
#error("Please select TinyUSB for the USB stack!")
#endif
Adafruit_Arcada arcada;
void setup()
{
Serial.begin(9600);
arcada.arcadaBegin();
arcada.displayBegin();
arcada.setBacklight(255);
arcada.display->fillRect(0, 0, 160, 128, ARCADA_BLACK);
arcada.display->setTextColor(ARCADA_WHITE);
arcada.display->setCursor(0, 0);
arcada.display->print("FileSample");
// Initialize filesystem
arcada.filesysBeginMSD();
// Check FAT system
if(arcada.filesysBegin() == false)
{
arcada.haltBox("Not found filesystem");
}
// Write test
char* filename = "/FileSample/sample.txt";
char* sampleText = "sample text";
if(arcada.exists(filename) == true)
{
arcada.remove(filename);
}
File file = arcada.open(filename, O_WRITE | O_CREAT | O_TRUNC);
file.write(sampleText, strlen(sampleText));
file.close();
arcada.display->setCursor(0, 20);
if(arcada.exists(filename) == true)
{
arcada.display->print("Successful write file");
}
else
{
arcada.display->print("Can not write file");
}
// Read test
arcada.display->setCursor(0, 40);
if(arcada.exists(filename) == true)
{
char buffer[1024];
File file = arcada.open(filename, O_READ);
int filesize = file.fileSize();
file.read(buffer, filesize);
file.close();
buffer[filesize] = '\0';
arcada.display->print("Successful read file");
arcada.display->setCursor(0, 50);
arcada.display->print(buffer);
}
else
{
arcada.display->print("File not found");
}
}
void loop()
{
}
押したボタンが表示されます。
FileSample.zip